The differential equations (REF ) and (REF ), obtained by setting the primary descendants of \(S^{1}_a(x)=S_a(x)\)  and \(S^1_{ab}(x)=h_{ab}(x)\)  to zero, are both equations of motion of Euclidean "gauge – theories". Both have scalar "gauge-invariance" [1]}, [2]}, [3]} , i.e, the gauge transformation function is a scalar in both cases.
